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Revert "Don't use asynchronous work with flushes as it decreases reliability and two threads per GPU achieves the same throughput."

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This reverts commit 7223508f7e.

Bad idea. Need to work around sync lineup.
This commit is contained in:
Con Kolivas 2011-07-30 16:36:19 +10:00
parent decafea0ad
commit 411570d348
1 changed files with 29 additions and 24 deletions
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53
main.c
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@ -3030,12 +3030,34 @@ static void *gpuminer_thread(void *userdata)
struct timeval tv_gpustart, tv_gpuend;
suseconds_t gpu_us;
gettimeofday(&tv_gpustart, NULL);
timeval_subtract(&diff, &tv_gpustart, &tv_gpuend);
/* This finish flushes the readbuffer set with CL_FALSE later */
clFinish(clState->commandQueue);
gettimeofday(&tv_gpuend, NULL);
timeval_subtract(&diff, &tv_gpuend, &tv_gpustart);
gpu_us = diff.tv_sec * 1000000 + diff.tv_usec;
decay_time(&gpu_ms_average, gpu_us / 1000);
if (opt_dynamic) {
/* Try to not let the GPU be out for longer than 6ms, but
* increase intensity when the system is idle, unless
* dynamic is disabled. */
if (gpu_ms_average > 7) {
if (scan_intensity > -10)
scan_intensity--;
} else if (gpu_ms_average < 3) {
if (scan_intensity < 10)
scan_intensity++;
}
}
set_threads_hashes(vectors, &threads, &hashes, globalThreads, localThreads[0]);
if (diff.tv_sec > opt_scantime ||
work->blk.nonce >= MAXTHREADS - hashes ||
work_restart[thr_id].restart ||
stale_work(work)) {
/* Ignore any reads since we're getting new work and queue a clean buffer */
status = clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_TRUE, 0,
status = clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_FALSE, 0,
BUFFERSIZE, blank_res, 0, NULL, NULL);
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: clEnqueueWriteBuffer failed."); goto out; }
@ -3054,6 +3076,9 @@ static void *gpuminer_thread(void *userdata)
precalc_hash(&work->blk, (uint32_t *)(work->midstate), (uint32_t *)(work->data + 64));
work_restart[thr_id].restart = 0;
/* Flushes the writebuffer set with CL_FALSE above */
clFinish(clState->commandQueue);
}
status = queue_kernel_parameters(clState, &work->blk);
if (unlikely(status != CL_SUCCESS))
@ -3062,7 +3087,7 @@ static void *gpuminer_thread(void *userdata)
/* MAXBUFFERS entry is used as a flag to say nonces exist */
if (res[MAXBUFFERS]) {
/* Clear the buffer again */
status = clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_TRUE, 0,
status = clEnqueueWriteBuffer(clState->commandQueue, clState->outputBuffer, CL_FALSE, 0,
BUFFERSIZE, blank_res, 0, NULL, NULL);
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: clEnqueueWriteBuffer failed."); goto out; }
@ -3070,6 +3095,7 @@ static void *gpuminer_thread(void *userdata)
applog(LOG_DEBUG, "GPU %d found something?", gpu);
postcalc_hash_async(mythr, work, res);
memset(res, 0, BUFFERSIZE);
clFinish(clState->commandQueue);
}
status = clEnqueueNDRangeKernel(clState->commandQueue, *kernel, 1, NULL,
@ -3077,32 +3103,11 @@ static void *gpuminer_thread(void *userdata)
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: Enqueueing kernel onto command queue. (clEnqueueNDRangeKernel)"); goto out; }
gettimeofday(&tv_gpustart, NULL);
timeval_subtract(&diff, &tv_gpustart, &tv_gpuend);
status = clEnqueueReadBuffer(clState->commandQueue, clState->outputBuffer, CL_TRUE, 0,
status = clEnqueueReadBuffer(clState->commandQueue, clState->outputBuffer, CL_FALSE, 0,
BUFFERSIZE, res, 0, NULL, NULL);
if (unlikely(status != CL_SUCCESS))
{ applog(LOG_ERR, "Error: clEnqueueReadBuffer failed. (clEnqueueReadBuffer)"); goto out;}
gettimeofday(&tv_gpuend, NULL);
timeval_subtract(&diff, &tv_gpuend, &tv_gpustart);
gpu_us = diff.tv_sec * 1000000 + diff.tv_usec;
decay_time(&gpu_ms_average, gpu_us / 1000);
if (opt_dynamic) {
/* Try to not let the GPU be out for longer than 6ms, but
* increase intensity when the system is idle, unless
* dynamic is disabled. */
if (gpu_ms_average > 7) {
if (scan_intensity > -10)
scan_intensity--;
} else if (gpu_ms_average < 3) {
if (scan_intensity < 10)
scan_intensity++;
}
}
set_threads_hashes(vectors, &threads, &hashes, globalThreads, localThreads[0]);
gettimeofday(&tv_end, NULL);
timeval_subtract(&diff, &tv_end, &tv_start);
hashes_done += hashes;